1. Guna Tana Integrated Field Research and Development Center, and Department of Natural Resource Management Debre Tabor University Debre Tabor Ethiopia
2. Department of Geography Ghent University Ghent Belgium
3. Department of Natural Resource Management Bahir Dar University Bahir Dar Ethiopia
4. INRAE, AMAP, IRD, CIRAD, CNRS, University Montpellier, Bld de la Lironde Montpellier France
5. Laboratory for Applied Geology and Hydrogeology, Department of Geology Ghent University Ghent Belgium